Yamaha RP-U200 CAVIT External Audio Soundboard with Receiver (Discontinued by Manufacturer) 5-channel digital home-theater receiver for PCs 14 watts' RMS power to each of 5 discrete channels Compatible with all computer audio formats, including MP3, WMA, DVD, and computer games DTS and Dolby Digital 5.1-channel decoding Compatible with Win 98, Win 98SE, Win ME, Win 2000, Mac OS 9.1 or higher